Dynamics of global CO2 and PM2.5 nexus and suggestions on the pathway heading to sustainable development for different income countries - Jiaxin Liu; Ben Fu; Lijian Han; Guixiang Jin; Yuhui Xiao; Keqing Chen; Weifeng Li; Weiqi Zhou; Yuguo Qian (Physics and Chemistry of the Earth, Parts A/B/C, 2026)